16633139849 has 2 divisors, whose sum is σ = 16633139850. Its totient is φ = 16633139848.

The previous prime is 16633139843. The next prime is 16633139857. The reversal of 16633139849 is 94893133661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16491696400 + 141443449 = 128420^2 + 11893^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16633139849 is a prime.

It is a super-2 number, since 2×16633139849² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 16633139849.

It is not a weakly prime, because it can be changed into another prime (16633139843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8316569924 + 8316569925.

It is an arithmetic number, because the mean of its divisors is an integer number (8316569925).

Almost surely, 2^16633139849 is an apocalyptic number.

It is an amenable number.

16633139849 is a deficient number, since it is larger than the sum of its proper divisors (1).

16633139849 is an equidigital number, since it uses as much as digits as its factorization.

16633139849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2519424, while the sum is 53.

The spelling of 16633139849 in words is "sixteen billion, six hundred thirty-three million, one hundred thirty-nine thousand, eight hundred forty-nine".